X : y = 5:3 and x + y = 56 work out the value of x - y

x = 35

y = 21

x - y = 14

Step-by-step explanation:

x/y = 5/3 => x = 5y/3

x + y = 56 => 5y/3 + y = 56 => 8y/3 = 56 => y/3 = 7 => y = 21 => x = 56 - 21 = 35 => x- y = 35 - 21 = 14

The value of x-y is 14.

Step-by-step explanation:

If  x:y=5:3   is equal to x+y=56  then you can say that 5/8 of 56 is equal to the value of x  and 3/8 of 56 is equal to the value of y.  

so x=  

    x = 0.625 * 56

  x = 35  

And   y=   3/8 *56

     y= 0.375 *56

    y= 21      

Check: 35 + 21 =56

Now we know the value of x is 35 and the value of x is 21.

so x- y has to be 35 -21 = 14

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

: )

d 600 because 15*10*2=300

300+300=600

step-by-step explanation: